/Engine/Source/Runtime/Core/Public/Internationalization/Text.h
[ETextDirection](API\Runtime\Core\Internationalization\TextBiDi__ETextDirection) ComputeTextDirection ( const TCHAR * InString, const int32 InStringStartIndex, const int32 InStringLen, const [ETextDirection](API\Runtime\Core\Internationalization\TextBiDi__ETextDirection) InBaseDirection, [TArray](API\Runtime\Core\Containers\TArray)< [FTextDirectionInfo](API\Runtime\Core\Internationalization\FTextDirectionInfo) > & OutTextDirectionInfo )